3-23
20. Position the crane so that the boom may later be fully topped up, rotated and
extended. Do not operate these functions until the proper step.
21. Close the small gate valve in the return line and disconnect the return hose from
the return filter inlet again. Run the hose into the waste oil sump. Shutoff valves in
the suction lines must be open.
22. Pull the "Boom Raise" lever fully back in the raise position and start the engine.
Run at low idle until the boom is fully topped up, then stop engine quickly.
23. Pull the "Swing" lever fully. Run the engine for 3 seconds and stop engine.
24. Release "Swing" lever, push "Hoist" lever to full "Lower" position and run engine for
7 seconds, then stop engine.
25. Fill hydraulic reservoir.
26. Remove the hook from the load line and pull load line out of the boom tip.
27. Push "Telescope" lever fully forward in the "Extend" position. Run the engine until
the boom extends fully, then stop engine.
28. Reconnect the return hose. Be sure all shutoff valves are open.
29. Retract the boom and fill the reservoir.
30. Run engine and cycle all of the cylinders in and out several times.
BLEEDING THE BRAKES
The brake module on the end of each torque hub has a pedal-operated function and a
spring-applied pressure released parking brake. Each portion has a bleed screw on the
module. The upper bleed screw is for the pedal-operated system and the lower one is
for the pressure-released system. A system should be bled whenever a line in that
system has been disconnected.
To bleed the pressure-released section, run the engine to pressurize it and slowly
loosen the lower bleed screw until oil flows from the bleed screw. Be careful to avoid oil
spraying into your face or other parts of your body. After air has escaped, close the
bleed screw and repeat on the other side of the axle. Test brake for proper release.
To bleed the pedal-operated section, depress pedal and open the upper bleed screw.
Close the screw and allow pedal to return. Repeat on each brake until pedal is firm.
Apply brakes firmly four times and repeat the process once more. Keep reservoir full of
hydraulic oil during bleeding.
Once a year bleed the pedal-operated brakes to force new oil into the brake lines and
cavities.
Courtesy of Crane.Market
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